MAX8804W Datasheet, PDF (1/17 Pages) Maxim Integrated Products – High-Voltage, Dual-Input, USB/AC Adapter Chargers in 2mm x 3mm TDFN

19-0785; Rev 1; 10/07
EVAALVUAAILTAIOBNLEKIT
High-Voltage, Dual-Input, USB/AC
Adapter Chargers in 2mm x 3mm TDFN
General Description
The MAX8804W/MAX8804Y/MAX8804Z intelligent,
dual-input, stand-alone, constant-current, constant-volt-
age (CCCV), thermally regulated linear chargers are
designed for a single-cell lithium-ion (Li+) battery. They
integrate the current-sense circuit, MOS pass element,
thermal-regulation circuitry, and overvoltage protection
(OVP), and eliminate the reverse-blocking Schottky
diode to create a simple and small charging solution for
handheld equipment.
The MAX8804W/MAX8804Z function as stand-alone
chargers to control the charging sequence from the pre-
qualification state through fast-charge, top-off charge,
and full-charge indication. The MAX8804Y eliminates the
prequalification state to allow startup into a load without
a battery. Proprietary thermal-regulation circuitry limits
the die temperature when fast-charging or while
exposed to high ambient temperatures, allowing maxi-
mum charging current without damaging the IC.
The MAX8804Y/MAX8804Z achieve high flexibility by
providing an adjustable DC/USB fast-charge current
through a simple single-wire interface (SET input). The
chargers automatically select between either a USB or
AC adapter input source. The AC adapter charge cur-
rent is programmable from 400mA to 700mA in 50mA
steps through a serial interface. The USB charge cur-
rent is programmable to 95mA, 380mA, or 475mA
through the same interface. Other features include an
active-low battery charging-status indicator (CHG), an
active-low power-OK indicator (POK), an active-low
USB input detection output (USBPWR) on the
MAX8804Y/MAX8804Z, and battery pack detection
(DETBAT) on the MAX8804W.
The MAX8804W/MAX8804Y/MAX8804Z accept a 4.15V
to 30V DC source voltage or a 4.15V to 16V USB input
voltage, but disable charging when either input voltage
exceeds 7.5V to protect against unqualified or faulty
input sources. The MAX8804W/MAX8804Y/MAX8804Z
operate over the extended temperature range (-40°C to
+85°C) and are available in a tiny 8-pin thermally
enhanced 2mm x 3mm TDFN package.
Applications
Cell Phones/Smartphones
Digital Cameras
Portable Media Players
MP3 Players
Other Handheld Devices
Pin Configuration appears at end of data sheet.
Features
♦ Complete Chargers for Single-Cell Li+ Battery
♦ Dual-Input, 30V AC Adapter/16V USB
♦ No External FET, Blocking Diode, or Sense
Resistor Required
♦ Automatic USB/AC Adapter Input Selection
♦ Easy Programmable Fast-Charge Current and
Top-Off Threshold
♦ Proprietary Die Temperature Regulation Control
♦ ±5% Fast-Charge Current-Limit Accuracy
♦ Battery Pack Detection Input (MAX8804W)
♦ Power-Present and Charger-Status Outputs
♦ No Prequalification Charge (MAX8804Y)
♦ Tiny 2mm x 3mm Thermally Enhanced TDFN
Package
♦ USB Charging Protected by US Patent #6,507,172
Ordering Information
PART
PIN-
PACKAGE
PKG
CODE
TOP
MARK
MAX8804WETA+ 8 TDFN-EP*
T823+1
AAP
MAX8804YETA+ 8 TDFN-EP*
T823+1
AAD
MAX8804ZETA+ 8 TDFN-EP*
T823+1
AAC
*EP = Exposed paddle.
+Denotes a lead-free package.
Note: All devices are specified to operate over the -40°C to
+85°C operating temperature range.
Typical Application Circuit
+3.3V
AC
ADAPTER
1μF
USB
PORT
1μF
DC
CHG
MAX8804W
GND _{MAX8804Y POK}
MAX8804Z
USB
<USBPWR>
(DETBAT)
ENABLE/DISABLE
AND PROGRAMMING
SET
BAT
2.2μF
Li+
NOTE: () FOR MAX8804W, < > FOR MAX8804Y/MAX8804Z
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.